Have you ever wanted to have the old skins from the previous games but you can't find it anywhere? And also soundtracks from previous games? Well this topic might help you out! Just move them properly to your game folder and it's ready to go!

Skins
How to: Open the zip, there is more zips inside it, move those zips to Mydocuments/Trackmania/Skins/Vehicles/*Name of the envi here*